For Season #2 there are 2 themes, Fantasy and Modern.
If you choose a fantasy package, you get all backgrounds and items from all Fantasy packs, in Female, Male and Muscular packs.

And if you go to Settings, and choose a Modern pack beside a Fantasy, you get each and every background and item turned on, be they in a female, male or muscular pack. 🙂

Only thing is, we decided against labelling the backgrounds and items with the small coloured triangles, because with all the packages turned on all the time that would be distracting.